Snowboard boot upper



FIG. 1 is a right side elevational view of a snowboard boot upper, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof; and,

FIG. 5 is a top plan view thereof.

The broken line showing of a sole in FIGS. 1-5 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an snowboard boot upper, as shown and described. 